Grip ratchet



pct. 25', 1927.

w. l.. ATKINSON Patented oa. .25. 19.27.

f 1 UNITED srps WILLIAM I.. ATKINSON, or nniaoivns, wasrrineront GRIPRA'rcHEr.

Y applicati@ iediiovember 22.192,6.- serial No. 150,125.v

rlhisV invention vrelatesto a grippingdef I vice and aims to providenov-el means' where-y by the shaft with which the gripping device sis-'employed may be readily retarded in its movement, ratcheted orstopped'atftheuwill of the operator. Y v .y p

m'portant obj ect of the invention 1S to shoes thereof will be levenlyapplied throughout the circumference of the drum, thereby reducingstrain on the machinery vwith which the device is used, to the minilqualities.r n

the foregoing and other vobjects in Another object of the invention isto provide means whereby the shoe which is sectional in formation may beadjusted when.

t-he ysame becomes wornrto lose its gripping lVith n i n view which willappear as the description proceeds, the invention resides in the com-`binationzand arrangement of parts and in the details of constructionhereinafter described and claimed, it being understood that changes inthe precise embodimentpof the invention herein disclosed, may be madewithin the-scope of what is claimed, without departing from the spiritof the invention.

.u an.

' Figure 2.-

shaft forms a part of machinery not shown. The reference character 6indicates a brake drum which is Secured to the Yshaft by means of thepin 7 that tits in the opening of thev hub of the drum, as clearly shownby The periphery' 0f the. drum Whichig indi. cated at 8 is substantiallyV-shaped toaccommodate the inclined surfaces 9 of the l' sectional gripshoe embodying sectionsy 10, 11 and 12, the grip shoes being pivotallycon- Y' iiected by means of the pins 13.

The section 12.0f the shoe is provided with spaced extensions14 that areprovidedwith openings to receive the bolt 14- which provides a pivot forthe curved supporting member 15 of the grip actuating-mechanism.

-This curved supporting member `15 is provided witha right angledextremity 16 provide Aa gripping device 'wherein the gripl vlever mayswing on the shaft.

\ pivot for the link.

fof m'l with 'thredadererles tofreiveth adJustingboltS ,17 whichengagejthe slioulfl der 13 of grip section 10 aselearlyshown by Eem-e;v1- sfo-111211.rheshotmay bie fadjustedfwitlirespe'ct tolits drum.

Bolts ltlextend laterally from thesectionsl 1'@ 1() a-nd12fandaredisposed directly in line` withA each 'other wliere they sup'portthe coiled spring 20 that hasfitsl ends yconnected with thefbolts sothat the sections of the shoe are normally held in position to bereadily operated, and to insure against losty n Y,

motion at the time of operating the grip.

Associated with the lcurved supporting meinberl is an operating lever 21that has voneend thereof bifurcated and formed with the Y openingstoreceive the shaft 5 so i that A link 22 has pivotal connection lwith oneend of the curved supporting lmember 15 Cil and has pivotal `connectionwith the lever 21 by means ofthe extension 23 forming-a `part throughthe extension 23 and through the bifurcated portionof thelever k21acting as a of the linkv22, the bolt 24 which'passesi Y Bolt2'5vconnects the linli` totliecurved l supporting member 15 to permit ofpivotal vmovement of the link with respect to the member 15. From theforegoing itv will be obvious that should it be desired to apply thegrip, it is only necessary tofoperatethe le'- `ver to cause the curvedsupportingmember i 15 to rock, exerting a pressure on the sec; tionalgrip-shoe to move the sections of the grip shoe into grippingrelationwith the drum 6. f

Iclaim:-" 1. In a device of the character described, a drum, a shaft onwhich the drum is Vsecured, a shoe including a. plurality of pivotallyconnected sections', one of-the sections having a pair of curvedextensions, a sup porting member positioned `between' thevcurvedextensions and pivotally connected therewith, adgusting kscrewscarried by the' supportingmember, a shoulder vcarried by one Vof thesections'r and engagedv by the screws, said screws adapted to move theshoe'` with respect to the'drum to adjust it, and a" lever'for operatingthe shoe. i 2.'.Ina device of the character described, a gripdrum,ashaft on which the drumA is secured, a grip shoe 4,including a pluralityof pivotally c onnectedvsections, a curved member having pivotalconnection'with one of y the sections and having a right angled endportion, adjusting screws extending through the right angled end portionand engaging one of the shoe sections to adjust the, shoe With respectto the drum, and means for operating the shoe.

3. In a device of the characterl described, a

drum,k a curved supporting *member posil connecting thelever to theVsupporting member'so that movement of the lever Will move Y the drum. YY Y In testimony that I claim theforegoing as the supportingrmember tocause the shoe toA grip the drum.

4L. In a device of the character described,

a drum, a shaft on which the drum is mountf ed, a curvedv supportingmember, a lever rmounted on the shaft, m-eans for pivotally connectingthe supporting member to the lever, a. sectional shoev .having one ofits ends pivotally connected with the support-ing member,- means forvadjusting-the opposite end ofthe shoevvith respect to the drum, and

coiledsprings carried bythe shoe for nor-L 'mally urging the shoe intoengagement with my own,I'have hereto aixed my signature.

IVILLIAM ATKINSON.

